/*
 * This file is part of "JTA - Telnet/SSH for the JAVA(tm) platform".
 *
 * (c) Matthias L. Jugel, Marcus MeiÃŸner 1996-2005. All Rights Reserved.
 *
 * Please visit http://javatelnet.org/ for updates and contact.
 *
 * --LICENSE NOTICE--
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 * --LICENSE NOTICE--
 *
 */

package TelnetClient.dependencies;

import java.util.Vector;

/**
 * A script handler, that tries to match strings and returns true when it found
 * the string it searched for.
 * <P>
 * <B>Maintainer:</B> Matthias L. Jugel
 *
 * @version $Id: ScriptHandler.java 499 2005-09-29 08:24:54Z leo $
 * @author Matthias L. Jugel, Marcus Meiï¿½ner
 */
public class ScriptHandler
{

    /** debugging level */
    private final static int debug = 0;

    private int matchPos; // current position in the match
    private byte[] match; // the current bytes to look for
    private boolean done = true; // nothing to look for!

    /**
     * Setup the parser using the passed string.
     *
     * @param match
     *            the string to look for
     */
    public void setup(String match)
    {
	if (match == null)
	    return;
	this.match = match.getBytes();
	matchPos = 0;
	done = false;
    }

    /**
     * Try to match the byte array s against the match string.
     *
     * @param s
     *            the array of bytes to match against
     * @param length
     *            the amount of bytes in the array
     * @return true if the string was found, else false
     */
    public boolean match(byte[] s, int length)
    {
	if (done)
	    return true;
	for (int i = 0; !done && i < length; i++)
	{
	    if (s[i] == match[matchPos])
	    {
		// the whole thing matched so, return the match answer
		// and reset to use the next match
		if (++matchPos >= match.length)
		{
		    done = true;
		    return true;
		}
	    }
	    else
		matchPos = 0; // get back to the beginning
	}
	return false;
    }
}
